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Merge r231984: Handle big index in getelementptr instruction

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CodeGen incorrectly ignores (assert from APInt) constant index bigger
than 2^64 in getelementptr instruction. This is a test and fix for that.

Patch by Paweł Bylica!

Reviewed By: rnk

Subscribers: majnemer, rnk, mcrosier, resistor, llvm-commits

Differential Revision: http://reviews.llvm.org/D8219



git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_36@236108 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Pawel Bylica committed 2015-04-29 14:54:57 +00:00
1 parent 717982f879
commit ec52f31064
3 files changed
+92 -21
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test/CodeGen/X86/getelementptr.ll
+80
View File
@@ -0,0 +1,80 @@
; RUN: llc < %s -O0 -march=x86
; RUN: llc < %s -O0 -march=x86-64
; RUN: llc < %s -O2 -march=x86
; RUN: llc < %s -O2 -march=x86-64
; Test big index trunc to pointer size:
define i8* @test_trunc65(i8* %ptr) nounwind {
; CHECK-LABEL: test_trunc65
; CHECK: 3
%d = getelementptr i8, i8* %ptr, i65 18446744073709551619 ; 2^64 + 3
ret i8* %d
}
define i8* @test_trunc128(i8* %ptr) nounwind {
; CHECK-LABEL: test_trunc128
; CHECK: 5
%d = getelementptr i8, i8* %ptr, i128 18446744073709551621 ; 2^64 + 5
ret i8* %d
}
define i8* @test_trunc160(i8* %ptr) nounwind {
; CHECK-LABEL: test_trunc160
; CHECK: 8
%d = getelementptr i8, i8* %ptr, i160 18446744073709551624 ; 2^64 + 8
ret i8* %d
}
define i8* @test_trunc256(i8* %ptr) nounwind {
; CHECK-LABEL: test_trunc256
; CHECK: 13
%d = getelementptr i8, i8* %ptr, i256 18446744073709551629 ; 2^64 + 13
ret i8* %d
}
define i8* @test_trunc2048(i8* %ptr) nounwind {
; CHECK-LABEL: test_trunc2048
; CHECK: 21
%d = getelementptr i8, i8* %ptr, i2048 18446744073709551637 ; 2^64 + 21
ret i8* %d
}
; Test small index sext to pointer size
define i8* @test_sext3(i8* %ptr) nounwind {
; CHECK-LABEL: test_sext3
; CHECK: -3
%d = getelementptr i8, i8* %ptr, i3 -3
ret i8* %d
}
define i8* @test_sext5(i8* %ptr) nounwind {
; CHECK-LABEL: test_sext5
; CHECK: -5
%d = getelementptr i8, i8* %ptr, i5 -5
ret i8* %d
}
define i8* @test_sext8(i8* %ptr) nounwind {
; CHECK-LABEL: test_sext8
; CHECK: -8
%d = getelementptr i8, i8* %ptr, i8 -8
ret i8* %d
}
define i8* @test_sext13(i8* %ptr) nounwind {
; CHECK-LABEL: test_sext13
; CHECK: -13
%d = getelementptr i8, i8* %ptr, i8 -13
ret i8* %d
}
define i8* @test_sext16(i8* %ptr) nounwind {
; CHECK-LABEL: test_sext16
; CHECK: -21
%d = getelementptr i8, i8* %ptr, i8 -21
ret i8* %d
}